docs: def SetFillStyle(self, style):
          """
          *style* may be any fill style understood by ROOT or matplotlib.
  
          For full documentation of accepted *style* arguments, see
          :class:`rootpy.plotting.style.FillStyle`.
          """
          self._fillstyle = FillStyle(style)
          if isinstance(self, ROOT.TAttFill):
              ROOT.TAttFill.SetFillStyle(self, self._fillstyle('root'))